<template>
  <div class="app-container">
    <!-- 查询和其他操作 -->
    <div class="filter-container">
      <el-input
        v-model="listQuery.name"
        clearable
        class="filter-item"
        style="width: 200px"
        :placeholder="$t('promotion_ad.placeholder.filter_name')"
      />
      <el-input
        v-model="listQuery.content"
        clearable
        class="filter-item"
        style="width: 200px"
        :placeholder="$t('promotion_ad.placeholder.filter_content')"
      />
      <el-button
        v-permission="['GET /admin/ad/list']"
        class="filter-item"
        type="primary"
        icon="el-icon-search"
        @click="handleFilter"
        >{{ $t("app.button.search") }}</el-button
      >
      <el-button
        v-permission="['POST /admin/ad/create']"
        class="filter-item"
        type="primary"
        icon="el-icon-edit"
        @click="handleCreate"
        >{{ $t("app.button.create") }}</el-button
      >
      <el-button
        :loading="downloadLoading"
        class="filter-item"
        type="primary"
        icon="el-icon-download"
        @click="handleDownload"
        >{{ $t("app.button.download") }}</el-button
      >
    </div>

    <!-- 查询结果 -->
    <el-table
      v-loading="listLoading"
      :data="list"
      :element-loading-text="$t('app.message.list_loading')"
      :header-cell-style="{
        background: 'rgba(239, 241, 244, 0.2)',
        color: '#333333',
      }"
      border
      fit
    >
      <el-table-column
        align="center"
        :label="$t('promotion_ad.table.id')"
        prop="id"
        sortable
      />

      <el-table-column
        align="center"
        :label="$t('promotion_ad.table.name')"
        prop="name"
      />

      <el-table-column
        align="center"
        :label="$t('promotion_ad.table.content')"
        prop="content"
      />

      <el-table-column
        align="center"
        :label="$t('promotion_ad.table.url')"
        prop="url"
      >
        <template slot-scope="scope">
          <el-image
            :src="thumbnail(scope.row.url)"
            :preview-src-list="toPreview(scope.row, scope.row.url)"
            style="width: 80px; height: 40px"
          />
        </template>
      </el-table-column>

      <el-table-column
        align="center"
        :label="$t('promotion_ad.table.position')"
        prop="position"
      />

      <el-table-column
        align="center"
        :label="$t('promotion_ad.table.link')"
        prop="link"
      />

      <el-table-column
        align="center"
        :label="$t('promotion_ad.table.enabled')"
        prop="enabled"
      >
        <template slot-scope="scope">
          <el-tag :type="scope.row.enabled ? 'success' : 'error'">{{
            $t(
              scope.row.enabled
                ? "promotion_ad.value.enabled_true"
                : "promotion_ad.value.enabled_false"
            )
          }}</el-tag>
        </template>
      </el-table-column>

      <el-table-column
        align="center"
        :label="$t('promotion_ad.table.actions')"
        width="200"
        class-name="small-padding fixed-width"
      >
        <template slot-scope="scope">
          <el-button
            v-permission="['POST /admin/ad/update']"
            type="primary"
            size="mini"
            @click="handleUpdate(scope.row)"
            >{{ $t("app.button.edit") }}</el-button
          >
          <el-button
            v-permission="['POST /admin/ad/delete']"
            type="danger"
            size="mini"
            @click="handleDelete(scope.row)"
            >{{ $t("app.button.delete") }}</el-button
          >
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total > 0"
      :total="total"
      :page.sync="listQuery.page"
      :limit.sync="listQuery.limit"
      @pagination="getList"
    />

    <!-- 添加或修改对话框 -->
    <el-dialog width="60%"  :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible">
      <el-form
        ref="dataForm"
        :rules="rules"
        :model="dataForm"
        status-icon
        label-position="left"
        label-width="100px"
        style="width: 400px; margin-left: 50px"
      >
        <el-form-item :label="$t('promotion_ad.form.name')" prop="name">
          <el-input v-model="dataForm.name" />
        </el-form-item>
        <el-form-item :label="$t('promotion_ad.form.content')" prop="content">
          <el-input v-model="dataForm.content" />
        </el-form-item>
        <el-form-item :label="$t('promotion_ad.form.url')" prop="url">
          <el-upload
            :headers="headers"
            :action="uploadPath"
            :show-file-list="false"
            :on-success="uploadUrl"
            :before-upload="checkFileSize"
            class="avatar-uploader"
            accept=".jpg,.jpeg,.png,.gif"
          >
            <img v-if="dataForm.url" :src="dataForm.url" class="avatar" />
            <i v-else class="el-icon-plus avatar-uploader-icon" />
            <div slot="tip" class="el-upload__tip">
              {{ $t("promotion_ad.help.url") }}
            </div>
          </el-upload>
        </el-form-item>
        <el-form-item :label="$t('promotion_ad.form.position')" prop="position">
          <el-select
            v-model="dataForm.position"
            :placeholder="$t('promotion_ad.placeholder.position')"
          >
            <el-option
              :value="1"
              :label="$t('promotion_ad.value.position_1')"
            />
          </el-select>
        </el-form-item>
        <el-form-item :label="$t('promotion_ad.form.link')" prop="link">
          <el-input v-model="dataForm.link" />
        </el-form-item>
        <el-form-item :label="$t('promotion_ad.form.enabled')" prop="enabled">
          <el-select
            v-model="dataForm.enabled"
            :placeholder="$t('promotion_ad.placeholder.enabled')"
          >
            <el-option
              :value="true"
              :label="$t('promotion_ad.value.enabled_true')"
            />
            <el-option
              :value="false"
              :label="$t('promotion_ad.value.enabled_false')"
            />
          </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">{{
          $t("app.button.cancel")
        }}</el-button>
        <el-button
          v-if="dialogStatus == 'create'"
          type="primary"
          @click="createData"
          >{{ $t("app.button.confirm") }}</el-button
        >
        <el-button v-else type="primary" @click="updateData">{{
          $t("app.button.confirm")
        }}</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<style>
.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.avatar-uploader .el-upload:hover {
  border-color: #20a0ff;
}
.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 120px;
  height: 120px;
  line-height: 120px;
  text-align: center;
}
.avatar {
  width: 145px;
  height: 145px;
  display: block;
}
</style>

<script>
import { listAd, createAd, updateAd, deleteAd } from "@/api/ad";
import { uploadPath } from "@/api/storage";
import { getToken } from "@/utils/auth";
import Pagination from "@/components/Pagination"; // Secondary package based on el-pagination
import { thumbnail, toPreview } from "@/utils/index";

export default {
  name: "Ad",
  components: { Pagination },
  data() {
    return {
      thumbnail,
      toPreview,
      uploadPath,
      list: [],
      total: 0,
      listLoading: true,
      listQuery: {
        page: 1,
        limit: 20,
        name: undefined,
        content: undefined,
        sort: "add_time",
        order: "desc",
      },
      dataForm: {
        id: undefined,
        name: undefined,
        content: undefined,
        url: undefined,
        link: undefined,
        position: 1,
        enabled: true,
      },
      dialogFormVisible: false,
      dialogStatus: "",
      textMap: {
        update: "编辑",
        create: "创建",
      },
      rules: {
        name: [
          { required: true, message: "广告标题不能为空", trigger: "blur" },
        ],
        content: [
          { required: true, message: "广告内容不能为空", trigger: "blur" },
        ],
        url: [{ required: true, message: "广告链接不能为空", trigger: "blur" }],
      },
      downloadLoading: false,
    };
  },
  computed: {
    headers() {
      return {
        "X-Litemall-Admin-Token": getToken(),
      };
    },
  },
  created() {
    this.getList();
  },
  methods: {
    getList() {
      this.listLoading = true;
      listAd(this.listQuery)
        .then((response) => {
          this.list = response.data.data.list;
          this.total = response.data.data.total;
          this.listLoading = false;
        })
        .catch(() => {
          this.list = [];
          this.total = 0;
          this.listLoading = false;
        });
    },
    handleFilter() {
      this.listQuery.page = 1;
      this.getList();
    },
    resetForm() {
      this.dataForm = {
        id: undefined,
        name: undefined,
        content: undefined,
        url: undefined,
        link: undefined,
        position: 1,
        enabled: true,
      };
    },
    handleCreate() {
      this.resetForm();
      this.dialogStatus = "create";
      this.dialogFormVisible = true;
      this.$nextTick(() => {
        this.$refs["dataForm"].clearValidate();
      });
    },
    uploadUrl: function (response) {
      this.dataForm.url = response.data.url;
    },
    checkFileSize: function (file) {
      if (file.size > 1048576) {
        this.$message.error(
          `${file.name}文件大于1024KB，请选择小于1024KB大小的图片`
        );
        return false;
      }
      return true;
    },
    createData() {
      this.$refs["dataForm"].validate((valid) => {
        if (valid) {
          createAd(this.dataForm)
            .then((response) => {
              this.list.unshift(response.data.data);
              this.dialogFormVisible = false;
              this.$message.success({
                title: "成功",
                message: "创建成功",
              });
            })
            .catch((response) => {
              this.$message.error({
                title: "失败",
                message: response.data.errmsg,
              });
            });
        }
      });
    },
    handleUpdate(row) {
      this.dataForm = Object.assign({}, row);
      this.dialogStatus = "update";
      this.dialogFormVisible = true;
      this.$nextTick(() => {
        this.$refs["dataForm"].clearValidate();
      });
    },
    updateData() {
      this.$refs["dataForm"].validate((valid) => {
        if (valid) {
          updateAd(this.dataForm)
            .then(() => {
              // for (const v of this.list) {
              //   if (v.id === this.dataForm.id) {
              //     const index = this.list.indexOf(v)
              //     this.list.splice(index, 1, this.dataForm)
              //     break
              //   }
              // }
              this.getList();
              this.dialogFormVisible = false;
              this.$message.success({
                title: "成功",
                message: "更新广告成功",
              });
            })
            .catch((response) => {
              this.$message.error({
                title: "失败",
                message: response.data.errmsg,
              });
            });
        }
      });
    },
    handleDelete(row) {
      deleteAd(row)
        .then((response) => {
          this.$message.success({
            title: "成功",
            message: "删除成功",
          });
          this.getList();
        })
        .catch((response) => {
          this.$message.error({
            title: "失败",
            message: response.data.errmsg,
          });
        });
    },
    handleDownload() {
      this.downloadLoading = true;
      import("@/vendor/Export2Excel").then((excel) => {
        const tHeader = [
          "广告ID",
          "广告标题",
          "广告内容",
          "广告图片",
          "广告位置",
          "活动链接",
          "是否启用",
        ];
        const filterVal = [
          "id",
          "name",
          "content",
          "url",
          "postion",
          "link",
          "enabled",
        ];
        excel.export_json_to_excel2(tHeader, this.list, filterVal, "广告信息");
        this.downloadLoading = false;
      });
    },
  },
};
</script>
